• Proceedings of the KSAR Conference
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• 2002.06a
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• pp.28-28
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• 2002

본 연구는 종부형태가 이유한 암돼지의 번식성적에 미치는 영향을 조사하기 위하여 이유후 4-6 일경에 자연발정이 발현되어 수정적기라고 판단되는 암돼지에 12시간 간격으로 각각 자연종부 2회, 인공수정 2회 및 혼합교배(자연종부 l회＋인공수정 1회)의 형태로 나누어 종부하고 분만율과 산자수를 조사하였다. 분만율은 자연종부 78.5%, 인공수정 76.3% 및 혼합교배 76.0%로 나타나 종부형태간에 유의적인 차이가 없었으나 총산자수는 자연교배 9.89 두와 인공수정 10.04 두의 단독 종부 형태 보다 혼합종부형태가 10.26두로 높게 나타났다(P<0.01). (중략)

• 한우마당
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• v.4 no.2 s.18
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• pp.47-53
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• 2003

• The Korea Swine Journal
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• v.17 no.7 s.191
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• pp.167-169
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• 1995

• Korean Journal of Animal Reproduction
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• v.24 no.2
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• pp.171-178
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• 2000

To improve the pig farm management and efficiency of swine industry by inducing the farrowing to day-time from night, In the first experiment, reproduction records of purebred and crossbred pigs were collected and analyzed to estimate the $\varepsilon$ ffec 잉 of factors affecting day and night farrowing. The general linear model was used to estimate the least square means of the factors affecting various reproductive characteristics. And also, chi-square tests were used to examine the independence of the reproductive traits and environmental factors using the SAS (1992). The comparisons between pure and crossbred pigs for total number born, percentage of number born alive, gestation length, time length for farrowing were determined. The results indicated that the gestation length of crossbred (115.11 d) was slightly longer than that of purebred (114.89 d, p＜0.05). For the seasonal effects on total number born, the largest was found in spring and no differences were found among summer, fall and winter. The average gestation length was 1 day longer in spring and winter than in summer and fall. The total number born and number born alive were smaller in first, second, and greater or equal to sixth parity than other parities. And also, the percentage of no. born alive was least in greater or equal to sixth parity. For the effect of mating methods, natural and artificial insemination, on total number born and number born alive, no differences between the two methods were found. However, the percentage of number born alive for natural mating was 98.06% and was higher than artificial insemination(93.75%). The time length for farrowing was I hour were found for the 6 hrs of farrowing time. In general situation of pig farms, day-time farrowing was 34.8% and night farrowing was 65.2%, indicating that night farrowing was almost double of the night farrowing.

• Proceedings of the KSAR Conference
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• 2004.06a
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• pp.232-232
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• 2004

본 연구는 돼지의 발정동기화에 의한 과배란 유기시 돼지 난소의 배란상태(황체수)와 혈액내 혈액성분(WBC, RBC Hb, HCT, MCV, MCH, MCHC, Platelet)과의 비교분석을 통하여 다배란에 따른 표지(Marker) 혈액성분을 구명하기 위하여 실시하였다. 돼지 난소의 배란상태를 구명하기 위하여 30두의 성축 암컷을 이용하였으며, 발정 동기화는 PG 600(PMSG 400 IU, HCG 200IU)을 주사한 후 10일 후에 Regumate porcine을 6일간 급여한 후에 PMSG 주사하고 2일 후에 hCG주사한 다음날 자연종부를 실시하여 수정에 이르게 하였다. (중략)

• Korean Journal of Animal Reproduction
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• v.24 no.2
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• pp.209-216
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• 2000

This study was carried out to investigate the effects of breed, age of boar, season, parity and mating system on boar semen characteristics and fertilizing capacity. A total of 4181 sows and 199 boars of Durocs (D), Landraces (L), and Yorkshires (Y) were used for this experiment at Darby Artificicial Insemination Center from 1996 through 1999. Semen volume per ejaculate was largest in Landrace (266.8 $m\ell$), followed by Yorkshire, and was smallest in Duroc. Sperm motility did not show significant differences among the above breeds. Sperm concentration was lowest in Landrace (4.7$\times$10$^{9}$ sperm/$m\ell$) and was highest in Duroc (5.7$\times$10$^{9}$ sperm/$m\ell$). Semen volume per ejaculate according to the age of boars was largest at the age of 2 years, followed by the age of 4 and 3 years, and was smallest at the age of I year. Semen volume per ejaculate according to the season in boars was largest in winter (228.6 $m\ell$), followed by autumn and summer, and was smallest in spring. Sperm concentration was highest in spring (5.9$\times$10$^{9}$ sperm/$m\ell$), followed by summer and winter, and was lowest in autumn. The average litter weight at birth did not show any differences according to the mating type. But the number of pigs born alive per litter was largest (9.5 pigs) in the natural mating ＋ artificial insemination group, followed by the artificial insemination group (9.2 pigs), and was smallest (8.9 pigs) in the natural mating group (P＜0.01). The average litter weight at birth and number of pigs born alive per litter did not show any differences between the natural mating and artificial insemination. The L (♀)$\times$Y (♂) and L (♀)$\times$L (♂) matings show $\varepsilon$ d higher average litter weight at birth and number of pigs born alive per litter than the Y (♀) $\times$ Y (♂) and Y (♀) $\times$ L (♂) matings. The pigs in the 2~6th parities had higher average litter weight at birth and number of pigs born alive per litter than those in the 1 st and 7~9th parities.

• Korean Journal of Agricultural Science
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• v.34 no.1
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• pp.61-65
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• 2007

This study was conducted to evaluate the response of CIDR-S on estrus synchronization of dairy goats and the effect of artificial insemination on conception rate. Estrus synchronization of sexually matured Saanen goats was induced with insertion of CIDR-S into vagina for 15 days and injection of 500 IU PMSG before removal of CIDR-S. Artificial insemination was conducted using liquid or frozen semen by intra-cervical insemination with synchronized does. Estrus synchronization was 90% using CIDR-S insertion for 15 days. Conception rate of inseminated does was 20% - 25%, while that of natural mated does was 100%. These results suggested that synchronization of dairy goats can be successfully induced and artificial insemination method has to be improved for the practical use in dairy goats.